Glossary | 3Com DSA-3CV1100-02 specification

GLOSSARY 147

GLOSSARY

ac Alternating Current. Electric current that reverses its direction of flow periodically according to frequency measured in hertz, or cycles per second.

CO Central Office. Another name for the Line Card (LC), a card in the VCN AC chassis; the card provides an Ethernet port and an LMI port.

Constellation The digital bit rate per analog symbol.

dc Direct Current. Electric current that does not reverse its direction of flow.

DS Down stream. The direction in VDSL towards the user workstation. EMC Electromagnetic compatibility

HDLC High-level Data Link Control. HDLC is a bit oriented, synchronous protocol that applies to the data-link message packaging layer (layer 2 of the ISO/OSI model) for computer communications. messages are transmitted in units called frames, which contain differing amounts of data but which must be organized in a particular way.

Hz Abbreviation for hertz, electrical cycles pr second.

ID Identifier used for the management login procedure.

ISP Internet service Provider. A business that supplies Internet connectivity services to individuals, businesses and other organizations within a local area.

IT Information Technology

Krone connectors Connectors on patch cords used to connect or jumper patch panels

LAN Local Area Network. A group of computers and other devices dispersed over a relatively limited area and connected by a communications link that enables every device to interact with any other on the network.

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3Com DSA-3CV1100-02 service manual Glossary

Contents

Release Visitor and Community Network Access Concentrator 3Com Corporation 5400 Bayfront Plaza Santa Clara, California Contents Troubleshooting 127130 Inability to Connect Broken Session 131 Online Technical Services 141 World Wide Web Site 3Com FTP Site 142143 Page Conventions List conventions that are used throughout this guideIcon Description Compliance RelatedDocumentation Year Community Major Features BenefitsFeatures Visitor Overview Applications MTU/MDU Application VCN AC Features VCN AP VCN AC Front Panel State Used to Features Real Time LED IndicationsLocal Management VCN AC Front Panel LEDs Remote Management Central Management Overview Safety Precautions Installing the VCN Access Concentrator Précautions de SécuritéSicherheitsvorkeh- rungen Concentrator For the VCN AccessVisitor and Community Network system is installed Preparing the Site Installing the VCN Access Concentrator Punch-down Block with a Patch Panel Installing the VCN Access Concentrator Punch-Down Block Without a Patch Panel VCN Access Point Rear Panel Repeat through for up to 24 telephone lines Installing the VCN Access Concentrator Part Quantity Access Concentrator 19-inch rack. in the 19-inch RackVCN Access Concentrator Accessory Set Cable Kit Fitting a Bracket for Rack Mounting Back Panel Connections Front Panel Connections Displays the rack after it has been wire connected Is P VCN AC Port No First Pin Second Pin Line Cards in the VCN Access ConcentratorPatch Panel blocks at the back with RJ-21 connectors Pin Assignment for the RJ-21 Connector Female RJ-21 Connector VCN Access Concentrator Unit Installed Without a Patch Panel Sequence of Configuration Inserting MAC Addresses for VCN Access Concentrator PortsGeneral guidance is provided for non-SuperStack switches Installing the VCN Access Concentrator Port No. MAC Address VCN AC Port and VCN AP MAC Addresses Installing the VCN Access Concentrator Automated Procedures for SuperStack II 1100/3300 ConfApp Screen ConfApp screen appears Figure Entering the Switch Address Community Parameter Removing Wrong Address Powering Up Ethernet SwitchVCN Access SPE-3, SPT-3, G, W Troubleshooting Installing the VCN Access Concentrator Status of each line in the VCN AC Real Time LEDIndications This chapter describes the following Using ManagementTerminal for Local Central Management Terminal Emulator Connecting the PC To connect the PC to the LMA port Line CardThis section describes local management LoginType your Login ID and press Enter Type your password and press Enter Line Card Menu Hierarchy and Summary Line Card Main Menu Line Card Menu Structure Number Sequence Corresponding to Submenus Line Card Main Menu of Port Press Enter to return to the Line Card Main Menu LC Version Ethernet Menu Management Menu Ethernet Menu Options Ethernet Menu Options Feature How to useEthernet Menu options are described in Table Ethernet Traffic Counters Typical Ethernet Traffic Counters Screen Ethernet Status Change Ethernet Work Mode Menu Reset Ethernet Counters When you discard the operation, the message appears Setting Internal Loopback Mode Setting Normal Mode Hdlc Traffic counters Hdlc Menu Options Feature How to useHdlc Menu Hdlc Menu options are described in Table Hdlc Status Change Hdlc Work Mode Reset Hdlc Counters Normal mode is lack of loopbacks To check the Vdsl parameters Vdsl Control Menu Reset All Counters SNR, signal to noise ratio Login message appears Reset the Line Card Set Vlan ID for Management LC Configuration Menu After any number the user enters, the message appears Set Ethernet Half/Full Duplex ModeChange Password Respond by entering your new password. The message appears Set to Factory Defaults Through the LMATo download new software perform the following steps Procomm Plus window shown in , select Data Send File Figure Type S the downloading message in appears Procomm Plus Terminal Screen Procom Plus Data Send File Menu Sending File Using Ascii Screen Status Screen File Downloaded Messages Software Execution Messages Line Card Management This section describes central management LMA Access for Central Management Central Management Menus in the LMA Interface Login Process Central Management Menu Hierarchy and Summary Login Process Central Management Menu Structure Central Management Menus and Corresponding Number Sequence VCN Access Concentrator Menu To access central management Management Agent MenuLine Card Main Menu for Line Card Slot 1 Line Card Main Menu Version Information Hardware and Software Version Monitoring Menu Monitoring Menu Brief Status of All Ports Refresh Brief Status or View Port Statistical Detail Detailed Port Status Select Traffic Counters and Port Traffic Counters for Selected Port Vdsl Information for Selected Port Dialog in appears Vdsl Information for Selected Port Reset Port Control MenuChange Port Selection in Control Menu If you type y, the following message appears If you type N, the message appears To abort type n and press Enter This is followed by the messages in and , Login promptMessages in appear Vdsl Restart Type n and press Enter to abort Concentrator Configuration Menu Change Vlan ID for Management Type 2 and press Enter the following dialog appears Change Ethernet Half or Full Duplex Mode Change the Concentrator Password Type your new password and press Enter. The message appearsAgent Configuration Menu IP Menu IP Menu If a Telnet session exists, the message appears Save changes, type y and press Enter Messages appearDiscard changes, type n and press Enter n Close Telnet Session Set Factory Defaults Default is n Overview Reset AgentTo reject, type n and press Enter the message appears To proceed, type y and press Enter the message appears Structure of Remote Menus Telnet Connection Telnet Menu Structure Central Management Menus and Corresponding Number Sequence VCN Access Concentrator Telnet Login Hardware and Software Version Menu appears To configure VCN AC management, type 5 in the VCN Access Exiting the Telnet Management Session To terminate, type y and press Enter the message appearsTelnet session is closed Download Downloading Software to the LCs in the VCN AC Procedure VCN Service Switch 10 Front Pane VCN AP Main Menu Enter the AC Vlan ID and press Enter. The message appears VCN AP Software Download Menu LC Downloading State Table LC Downloading Results Enter the AP Vlan ID and press Enter. The message appears Downloading Software to VCN APs AP Downloading State Table Check Software Download for the LC Cards Check the physical path between the downloading VCN AP Download Failed for all LCs and all VCN APsDownload Failed for One or More Line Cards but not All Check the following Software version of the failed LCs Download Failed for One or More VCN APs but not All Managing the VCN Access Concentrator State Line Power LEDs to Solve Using Front PanelProblems Indicator LEDs Ethernet Traffic Counters Hdlc Traffic Count Indicators Error message Significance User Action From Traffic Counts Frame countsFatal Telnet Connection Problems Telnet Connection Problems Troubleshooting Product Specification Product Specification Procomm Plus Terminal screen in appears Terminal Emulation Settings Number From Left Function Settings Procomm Plus Settings 137 Setup window opens Select System Tab Parity None Flow control139 Terminal Emulation Settings Online Technical Services Country Data Rate Telephone Number Access by Analog ModemUsername anonymous Hours a day, 7 days a week Access by Digital Modem 847 262408 727 Country Telephone Number Asia, Pacific Rim Europe, South Africa, and Middle East Country Telephone Number Fax Number Page Glossary Mbaud MbpsMiniDIN Glossary Glossary Numbers Index Remote software download Requirements Vlan ID Index 3Com Corporation Limited Warranty Governing LAW EMC Statements